There are two main types of maglev train that use magnetism in different ways. Electromagnetic suspension (EMS) uses C-shaped arms that wrap underneath the track. Electromagnets on the underside pull the train up by attracting the arms to the bottom of the track.
Electrodynamic suspension (EDS), pictured here, uses the train’s motion to induce magnetic eddy currents in the metal rail, which creates a cushion of magnetic repulsion. The sides of the track have magnetic coils built in, which create an overlapping pattern of alternating north and south magnetic fields.
To accelerate, the train rapidly alternates the direction of its own supercooled magnetic coils to attract the front of the train to the next coil along the rail.